Table 1. Patient demographics and risk factors in RA.
Variable | Cases (n=574) | Controls (n=804) | P |
---|---|---|---|
Age (years) | 54.5 ± 15.1 | 55.7 ± 10.1 | 0.080 |
Female/male | 427/147 | 599/205 | 0.962 |
Onset age (years) | 45.6 ± 12.9 | ||
Disease duration (years) | 8.9 ± 9.2 | ||
Treatment duration (years) | 7.6 ± 7.8 | ||
RF-positive | 456 (79.4%) | ||
ACPA positive | 300 (52.2%) | ||
CRP-positive | 323 (56.3%) | ||
ESR (mm/h) | 33.7 ± 25.2 | ||
DAS28 | 4.3 ± 1.5 | ||
Functional class | |||
I | 73 (12.7%) | ||
II | 256 (44.6%) | ||
III | 209 (36.4%) | ||
IV | 36 (6.3%) |
Abbreviations: CRP, C-reactive protein; ESR, erythrocyte sedimentation rate; DAS28, RA disease activity score; RF, rheumatoid factor.